LLM International Maritime Law and Sustainability: Assessment 2 — Research Essay on Anti-Corruption Compliance in Port State Control and Maritime Administration

Institution: Liverpool John Moores University | Programme: LLM International Maritime Law and Sustainability | Module: Maritime Law and Policy (Level 7) | Assessment Type: Individual Research Essay | Weighting: 60% of module grade | Word Count: 4,000 words, excluding references and footnotes | Referencing: Harvard Cite Them Right | Submission: PDF via Canvas | Deadline: Week 12, Semester 2

Assessment Context and Rationale

Liverpool John Moores University LLM International Maritime Law and Sustainability students on the Maritime Law and Policy module complete Assessment 2 as an individual research essay. The assessment requires independent legal research into the compliance gap between international anti-corruption commitments and the operational reality of port State control and maritime administration. The essay tests whether existing international legal instruments, soft law guidance, and industry collective action mechanisms provide sufficient accountability when Port State Control Officers exercise discretionary enforcement powers. Focus falls on two connected problems: the legal status of the IMO Code of Good Practice for Port State Control Officers and the empirical relationship between perceived corruption and detention outcomes. The brief assumes no access to the module’s Canvas site; all instructions and criteria appear below. Confirm module-specific formatting requirements against your Module Guide before submission.

Task Description

Write a 4,000-word legal research essay answering the following question: To what extent do international legal and regulatory frameworks effectively address corruption risks in port State control and maritime administration, and what legal or institutional reforms would strengthen anti-corruption compliance?

The essay must address four elements. First, explain the legal character of the relevant international instruments, including the IMO Code of Good Practice for Port State Control Officers (MSC-MEPC.4/Circ.2), the United Nations Convention against Corruption (UNCAC), and the IMO Instruments Implementation Code (III Code), and assess whether these instruments create enforceable obligations or rely on voluntary compliance. Second, analyse the structural vulnerabilities in port State control that create corruption risks, including discretionary detention powers, limited oversight of inspection decisions, and the scarcity of operational port facilities in some regions. Third, evaluate the empirical evidence on the relationship between perceived corruption and maritime safety outcomes, including detention rates and incident risk, and assess what that evidence implies for the effectiveness of current enforcement architecture. Fourth, propose and defend specific reforms, specifying whether the Code of Good Practice should be made mandatory, whether inspection data should be subject to independent audit, whether regional MoUs should adopt integrity assurance mechanisms, or whether industry collective action networks require formal legal recognition.

Requirements

• Use the IMO Code of Good Practice for Port State Control Officers, UNCAC Articles 5, 7, and 12, and the III Code as primary international sources; cite instrument titles and provision numbers precisely where applicable.
• Analyse the distinction between binding treaty obligations and non-binding IMO guidance, explaining why that distinction matters for enforcement of anti-corruption standards in port State control.
• Engage with Knapp et al. (2021) and at least two additional peer-reviewed analyses of port State control corruption, integrity, or inspection behaviour published between 2018 and 2026.
• Include a dedicated section on regional variation, addressing at least one regional MoU regime and the specific integrity challenges documented in that context.
• Identify specific structural weaknesses documented in empirical research, such as the relationship between port State corruption perceptions and detention probability, and the limited cross-checking of inspection decisions.
• Cite a minimum of 15 authoritative sources; at least 10 must be peer-reviewed or primary legal materials.
• Format the essay with numbered headings. Include a title page, word count declaration, and reference list in Harvard Cite Them Right format.
• Submit through Turnitin. A similarity score above 15% (excluding references) triggers academic integrity review.

Marking Rubric

Criteria align with the LJMU Generic Master’s Marking Criteria and the module’s learning outcomes.

Criterion	Weight	Distinction (70–100)	Merit (60–69)	Pass (50–59)	Fail (Below 50)
Legal knowledge and accuracy	25%	Precise, authoritative use of IMO guidance, UNCAC, and III Code provisions; nuances in the binding/non-binding distinction correctly identified and applied.	Sound grasp of core instruments; minor imprecisions do not undermine analysis.	Basic understanding; some instruments misapplied or the legal status of soft law conflated with treaty obligation.	Material legal errors; failure to distinguish binding obligations from voluntary guidance.
Critical analysis of corruption risks	25%	Original, evidence-based critique of port State control vulnerabilities; identifies non-obvious structural weaknesses such as discretionary detention and data opacity.	Clear analysis with adequate evidence; some descriptive passages but competent critique.	Limited critique; largely descriptive account of inspection procedures.	No substantive analysis; summary of instruments without evaluation.
Reform proposals and legal reasoning	20%	Proposals are specific, legally coherent, and grounded in doctrinal or empirical evidence; addresses implementation barriers and institutional incentives.	Reasonable proposals with adequate legal justification; some practical gaps.	Generic reform suggestions; weak connection to identified problems.	No viable proposals or proposals inconsistent with existing legal frameworks.
Research and sourcing	15%	Broad, current, authoritative sources; skilful synthesis of legal instruments, peer-reviewed literature, and empirical data; traceable citations.	Good range; mostly authoritative; adequate synthesis.	Limited range; overreliance on secondary summaries or news reports; some unverified claims.	Insufficient sources; unreliable materials; poor citation practice.
Structure, writing, and referencing	15%	Fluent, precise academic prose; logical paragraphing; flawless Harvard Cite Them Right referencing.	Clear writing; minor referencing errors; coherent structure.	Understandable but imprecise; some structural weaknesses; inconsistent referencing.	Poor organisation; frequent errors; referencing absent or incorrect.

Sample Answer: The Soft Law Problem in Port State Control Integrity

The IMO Code of Good Practice for Port State Control Officers sets out integrity, professionalism, and transparency as its three founding principles. It instructs officers to refuse bribery, avoid misuse of authority, and report blatant cases of corruption to the maritime authority. Those instructions carry no binding legal force. The Code operates as guidance annexed to an IMO circular, not as a treaty obligation or a regulation with enforcement mechanisms. A Port State Control Officer who accepts an inducement to overlook a detention defect breaches the Code yet faces no international legal sanction under it. Domestic criminal law may apply, and the port State’s own administrative disciplinary procedures may apply, but the international instrument itself creates no enforceable duty. Knapp, Franses and Whitby (2021) demonstrate empirically that vessels registered in flag States with higher perceived corruption are more likely to experience incidents, and that port States with higher perceived corruption are less likely to detain vessels (https://www.sciencedirect.com/science/article/pii/S2666822X21000228). The finding suggests that corruption distorts the enforcement signal that port State control is supposed to transmit. A non-binding integrity code cannot correct that distortion on its own. Legal analysis should therefore ask whether the Code’s voluntary character is a design feature that preserves flexibility or a structural weakness that reproduces the compliance gap it aims to address.

Sample Answer: Regional MoUs and Integrity Assurance

Regional Memoranda of Understanding on Port State Control operate as the primary institutional layer between the IMO and national maritime authorities. The Abuja MoU, covering West and Central Africa, has partnered with the Maritime Anti-Corruption Network to deliver ethics and integrity leadership training for Port State Control Officers in the region (https://abujamou.org/). That partnership responds to documented integrity challenges, including regulatory capture, bribery, and political interference in port operations. Training alone does not create accountability. The Abuja MoU’s inspection data show irregular reporting before 2010, with only five member States submitting reports, and a gradual increase in inspection numbers thereafter (https://abujamou.org/). Irregular reporting limits the ability of the regional secretariat to detect anomalous detention patterns or inspection outcomes that might indicate corruption. A regional integrity assurance mechanism would require standardised reporting on inspection decisions, independent review of detention downgrades, and protected channels for reporting solicitation attempts. The IMO Code of Good Practice provides a normative baseline for such a mechanism, yet it leaves the design of oversight to regional bodies and national administrations. Legal reform proposals should therefore specify how regional MoUs can convert the Code’s principles into auditable practice rather than relying on periodic training events.

Data Opacity and Inspection Oversight

Inspection data opacity is a structural enabler of corruption in port State control. Detention decisions are recorded in regional databases, yet the reasoning behind a decision to downgrade a deficiency or release a vessel without detention is rarely subject to independent scrutiny. Knapp et al. (2021) show that the relationship between perceived corruption and detention probability is statistically significant, which implies that detention outcomes are not purely technical determinations. If detention probability varies with corruption perceptions rather than with vessel condition alone, then inspection discretion is doing work that the legal framework does not acknowledge. A reform proposal that focuses only on officer training will miss this structural dimension. Independent audit of a sample of inspection files, with authority to compare the recorded deficiency against the physical evidence and the applicable IMO instruments, would create a deterrent against improper downgrades. The audit function need not be criminal investigatory in nature; it can operate as a quality assurance mechanism within the regional MoU structure. Legal design should specify the auditor’s powers, the reporting obligations, and the consequences for administrations that fail to cooperate.

Industry Collective Action and Its Limits

The Maritime Anti-Corruption Network operates as an industry-led collective action initiative, established in 2011 to raise anti-corruption standards across the maritime sector. Its work includes reporting mechanisms, port-level engagement, and collaborative projects with regional MoUs. Scholarly analysis characterises MACN as a form of private authority that polices corruption pre-crime, in contrast to governments that police post-crime (https://research.cbs.dk/en/publications/policing-corruption-post-and-pre-crime-collective-action-and-priva). That distinction matters legally. Private authority can generate norms, monitor behaviour, and impose reputational consequences on members, yet it cannot arrest, prosecute, or detain. Its effectiveness depends on voluntary participation and on the willingness of port States to engage. A shipping company that declines to join MACN faces no legal consequence, and a port official who ignores MACN representations faces no international sanction. Collective action fills a governance gap that formal law leaves open, but it does not close the gap. Reform proposals that treat MACN as a substitute for binding integrity obligations will overstate what private authority can deliver in a sector where enforcement powers remain sovereign.

Why Soft Law Persists

A student might reasonably ask why States have not adopted a binding anti-corruption instrument for port State control. Several explanations deserve consideration:

1. A binding instrument would require consensus on definitions of corrupt conduct, standards of evidence, and enforcement procedures, which may be difficult to achieve across diverse legal systems.
2. Port State control already operates through regional MoUs, and a new binding instrument would need to integrate with those structures without displacing them.
3. Sovereignty concerns about external audit of inspection decisions may deter States from accepting enforceable integrity obligations.
4. Industry collective action provides a lower-cost alternative that governments can endorse without accepting new legal duties.

These explanations do not justify the absence of binding obligations, yet they clarify the political constraints that any reform proposal must address. A realistic proposal may combine incremental hardening of soft law with regional audit mechanisms and domestic criminal enforcement. Knapp et al. (2021) provide empirical support for the proposition that corruption perceptions affect enforcement outcomes, which strengthens the case for external oversight. Legal analysis that ignores the political economy of soft law will produce reform proposals that cannot be implemented.

Conclusion

Anti-corruption compliance in port State control rests on a weak legal foundation. The IMO Code of Good Practice articulates sound principles, yet it creates no enforceable obligations. Regional MoUs deliver training and coordination, yet they lack independent audit powers. Industry collective action fills part of the gap, though private authority cannot substitute for public enforcement. Knapp et al. (2021) show that corruption perceptions correlate with detention outcomes and incident risk, which suggests that the current architecture does not neutralise the distorting effect of corruption on enforcement. Reform should focus on mandatory integrity assurance within regional MoUs, independent audit of inspection decisions, and domestic criminal enforcement against solicitation and bribery. Legal analysis that distinguishes formal compliance from substantive integrity, and that grounds proposals in empirical evidence rather than normative assertion, will satisfy the rubric at the highest band.

References

Abuja Memorandum of Understanding on Port State Control. (2024). Ethics and integrity leadership training for Port State Control Officers in Lagos. https://abujamou.org/

International Maritime Organization. (2019). Code of Good Practice for Port State Control Officers (MSC-MEPC.4/Circ.2). https://www.tokyo-mou.org/

Knapp, S., Franses, P. H., & Whitby, B. (2021). Measuring the effect of perceived corruption on detention and incident risk in the maritime industry: An empirical analysis. Maritime Transport Research, 2, 100025. https://www.sciencedirect.com/science/article/pii/S2666822X21000228

Maritime Anti-Corruption Network. (2024). The socioeconomic costs of maritime corruption in Nigeria. https://collective-action.com/

Policing corruption post- and pre-crime: Collective action and private authority in the maritime industry. (2018). Indiana Journal of Global Legal Studies, 25(1), 131–156. https://research.cbs.dk/en/publications/policing-corruption-post-and-pre-crime-collective-action-and-priva

United Nations. (2003). United Nations Convention against Corruption. https://www.unodc.org/unodc/en/treaties/CAC/

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Anti-Corruption Compliance in Port State Control and Maritime Administration

International law recognises that corruption can undermine maritime safety, yet the rules that govern port State control remain largely advisory. Port State control exists as a second line of defence against substandard ships: where flag State supervision fails, a port State may inspect a foreign vessel and detain it until serious deficiencies are corrected (International Maritime Organization [IMO], 2025). The problem is that the officer making that decision often exercises substantial discretion, while the international standards governing integrity are not directly enforceable.

The central argument is that current frameworks identify corruption as a threat but do not create sufficient institutional accountability to prevent it. The United Nations Convention against Corruption (UNCAC) imposes treaty duties on States parties, the IMO Instruments Implementation Code (III Code) supports audit-based implementation, and the IMO Code of Good Practice sets ethical expectations for inspectors. However, these instruments operate at different legal levels and leave inspection decisions, detention outcomes and complaint handling largely within national control.

Legal status of the instruments

UNCAC is the principal binding instrument. Articles 5, 7 and 12 require States parties to adopt coordinated anti-corruption policies, maintain merit-based and transparent public administration, and prevent corruption involving the private sector (United Nations, 2003). These obligations are legally binding between States parties, although their practical force depends on domestic legislation, enforcement capacity and political will.

The IMO Code of Good Practice for Port State Control Officers occupies a different position. It establishes integrity, professionalism and transparency as the three principles against which inspectors’ conduct should be judged, and it expects officers to resist corrupting influences (IMO, 2023). Its language is directive in tone, but it is issued as IMO guidance rather than as a convention provision. Therefore, an officer who accepts an inducement may breach the Code, yet the Code itself provides no international sanction.

The III Code adds an implementation dimension. It provides criteria for IMO Member State audits and encourages States to assess how effectively they implement applicable instruments (IMO, 2025). Its value lies in institutional review rather than direct punishment. An audit may reveal weaknesses in a maritime administration, but it does not itself reverse an improper detention decision or prosecute an official who solicited a bribe.

The distinction matters because anti-corruption standards in port State control depend on three separate layers: treaty duties, audit processes and professional guidance. UNCAC can support domestic criminal and administrative action; the III Code can expose systemic implementation failures; the Code of Good Practice can shape professional norms. None of these layers, standing alone, gives a shipowner, seafarer or port user a direct international remedy against corrupt inspection conduct.

Structural vulnerabilities in port State control

Discretion creates the first vulnerability. An inspector must decide whether a deficiency is recordable, whether it warrants rectification before departure, and whether the vessel should be detained. Those judgments require technical expertise, but they also leave room for selective enforcement. A minor defect may become a basis for delay, while a serious defect may be downgraded if an improper payment changes the officer’s assessment.

Limited oversight compounds that discretion. Regional databases record inspections, deficiencies and detentions, but they do not usually expose the full reasoning behind a decision to release a vessel or reduce the severity of a finding. Without access to inspection notes, photographic evidence and the applicable convention provisions, an external reviewer cannot easily test whether the outcome was proportionate. Opacity therefore protects not only legitimate professional judgment but also improper interference.

Resource scarcity intensifies the risk. Some port States have limited trained inspectors, inadequate testing equipment or few operational facilities for repairs and surveys. Where a vessel cannot obtain timely technical support, an inspector faces pressure to permit departure despite unresolved safety concerns. Conversely, where inspection capacity is weak, commercial actors may exploit administrative bottlenecks to obtain favourable treatment.

The problem is not simply individual dishonesty. It is an institutional design problem: considerable power is concentrated in inspection decisions, while verification mechanisms remain thin. A system that relies mainly on ethics training assumes that officers will self-regulate. That assumption is inadequate where promotion, workload, political pressure or personal financial incentives affect enforcement choices.

Empirical evidence and enforcement outcomes

Empirical research supports the view that corruption perceptions affect port State control outcomes. Knapp, Franses and Whitby (2021) analyse the relationship between perceived corruption, vessel detention and incident risk, finding that vessels associated with flag States perceived as more corrupt face higher incident risk, while port States perceived as more corrupt are less likely to detain vessels. The finding is important because detention is meant to signal that a ship is unsafe or non-compliant.

If detention probability falls where corruption perceptions are higher, the enforcement signal becomes distorted. A vessel may pass through a port without the corrective action its condition requires. The consequence is not confined to paperwork: weakened detention practice may allow unsafe ships to continue trading, increasing the likelihood of casualties and pollution incidents.

Other research points in a similar direction. Yang, Yang and Teixeira (2020) find that port State control abuse and corruption decreased under a new inspection regime, although interview evidence still identified continuing cases. Their study suggests that procedural reform can reduce opportunities for improper conduct, but it does not eliminate the underlying incentives. Inspection regimes can improve consistency, yet they cannot fully control the behaviour of officials operating with discretion.

The evidence therefore supports a cautious conclusion. Perceived corruption is not proof of corruption in every individual case, and detention rates reflect vessel quality, inspection targeting and regional practice as well as integrity. Even so, the association between corruption perceptions and lower detention likelihood is difficult to reconcile with a purely technical model of inspection. It indicates that current enforcement architecture does not neutralise corruption risk.

Regional variation: the Abuja MoU

Regional variation shows why a single global rule is insufficient. The Abuja Memorandum of Understanding covers 22 maritime administrations in West and Central Africa and operates under a cooperative agreement with the IMO (Abuja MoU, 2026). Its members face practical constraints that differ from those in established European or Asian inspection regimes, including uneven administrative capacity, limited technical infrastructure and exposure to port-level corruption risks.

The Abuja MoU has responded through cooperation with the Maritime Anti-Corruption Network (MACN). In 2024, it delivered ethics and integrity leadership training for Port State Control Officers from all 22 member States, aligning the programme with the IMO Code of Good Practice and IMO facilitation guidance (Abuja MoU, 2024). Training is valuable because it reinforces professional standards and gives inspectors a shared vocabulary for resisting solicitation.

Training alone, however, does not create accountability. A workshop may improve awareness, but it cannot audit a detention file, protect a whistleblower or discipline an official who ignores ethical guidance. The Abuja MoU publishes annual inspection statistics, which improves transparency, but publication of aggregate data does not establish whether individual release decisions were properly reasoned.

A stronger regional model would combine training with verifiable controls. The Abuja MoU could require standardised inspection records, independent review of a sample of non-detention decisions involving serious deficiencies, protected reporting channels for solicitation attempts, and publication of anonymised audit findings. Such measures would convert the Code’s ethical language into observable administrative practice.

Industry collective action and its limits

MACN demonstrates the potential of private collective action. It brings shipping companies and port stakeholders together to report corrupt demands, share risk information and engage public authorities on integrity reforms. Its work with the Abuja MoU shows that industry can support public institutions rather than merely complain about them (MACN, 2024).

Private authority has real limits. MACN can collect reports, promote standards and apply reputational pressure, but it cannot investigate criminal conduct, compel a port administration to cooperate or detain a vessel. Its influence depends on voluntary participation and on the willingness of States to act on the information it provides.

Formal legal recognition could strengthen this role without replacing public enforcement. Regional MoUs could authorise accredited industry bodies to submit structured corruption reports to a designated integrity unit, while preserving confidentiality and due-process protections. That would not give private actors enforcement powers; it would create a lawful channel through which operational evidence reaches accountable public authorities.

Reform proposals

The most defensible reform is to make core integrity requirements mandatory within regional MoUs, rather than attempting to convert the entire IMO Code into a treaty. Regional MoUs should require member administrations to adopt written anti-corruption procedures, maintain conflict-of-interest registers, rotate inspectors where practicable, and document the legal basis for every detention or release decision.

Independent audit should follow. A regional integrity unit, working with the MoU secretariat, should review a random sample of inspection files each year, with particular attention to serious deficiencies that did not result in detention. The auditor should compare the recorded deficiency, applicable IMO requirements and the stated reason for release. Findings should be reported to the relevant administration and, where systemic problems appear, to the MoU committee.

UNCAC provides the legal foundation for these measures. Article 5 supports coordinated prevention policy; Article 7 supports transparent and merit-based public administration; Article 12 supports private-sector prevention measures (United Nations, 2003). A regional audit mechanism would not create new treaty duties; it would help States discharge duties they already accepted.

Finally, industry reporting should receive formal recognition. A protected reporting channel, managed jointly by the MoU secretariat and an independent integrity body, would allow shipping companies and seafarers to report solicitation without relying on informal contact with the same authority they may be accusing. The channel should include case-tracking, anonymised publication of trends and clear referral procedures for suspected criminal conduct.

Conclusion

Current international frameworks address corruption in port State control more clearly than they control it. UNCAC creates binding State-level duties, the III Code supports implementation review, and the IMO Code of Good Practice supplies professional standards, but none directly regulates the discretionary inspection decisions where corruption is most likely to occur. Empirical evidence linking higher perceived corruption with lower detention likelihood suggests that this gap has operational consequences. Mandatory regional integrity procedures, independent file audits, protected reporting channels and formally recognised industry reporting would make anti-corruption compliance measurable rather than aspirational.

References

Abuja MoU. (2024). Abuja MoU and MACN train Port State Control Officers on ethics and integrity. https://abujamou.org/abuja-mou-and-macn-train-port-state-control-officers-on-ethics-and-integrity/

Abuja MoU. (2026). Abuja MoU in brief. https://abujamou.org/

International Maritime Organization. (2023). Procedures for port State control, 2023 (Resolution A.1185(33)). https://wwwcdn.imo.org/localresources/en/OurWork/IIIS/Documents/A%2033-Res.1185%20-%20PROCEDURES%20FOR%20PORT%20STATE%20CONTROL,%202023%20(Secretariat)%20(1).pdf

International Maritime Organization. (2025). Implementation of instruments support. https://www.imo.org/en/ourwork/iiis/pages/default.aspx

Knapp, S., Franses, P. H., & Whitby, B. (2021). Measuring the effect of perceived corruption on detention and incident risk in the maritime industry: An empirical analysis. Maritime Transport Research, 2, 100025. https://doi.org/10.1016/j.martra.2021.100025

Maritime Anti-Corruption Network. (2024). Strengthening integrity and transparency during port State control inspections. https://macn.dk/publications/

United Nations. (2003). United Nations Convention against Corruption. https://www.unodc.org/unodc/en/treaties/CAC/

Yang, Z., Yang, Z., & Teixeira, A. P. (2020). Comparative analysis of the impact of new inspection regime on port state control inspection. Transport Policy, 92, 65–80. https://doi.org/10.1016/j.tranpol.2020.03.008

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1. Introduction

Port State control exists as a critical safety net. It catches substandard vessels that flag States have failed to regulate, and it prevents them from proceeding to sea until deficiencies are corrected. The system depends on the integrity, professionalism, and independence of Port State Control Officers (PSCOs), who exercise considerable discretion when deciding whether to detain a vessel or allow it to sail. That discretion, however, creates structural vulnerability. Where oversight is weak and accountability diffuse, the power to detain becomes the power to extract. Corruption in port State control does not merely enrich individual officials; it distorts the enforcement signal that the entire maritime safety architecture is designed to transmit.

This essay examines the extent to which international legal and regulatory frameworks address corruption risks in port State control and maritime administration, and it proposes specific legal and institutional reforms to strengthen anti-corruption compliance. The analysis proceeds in four stages. First, it explains the legal character of the IMO Code of Good Practice for Port State Control Officers, the United Nations Convention against Corruption (UNCAC), and the IMO Instruments Implementation Code (III Code), assessing whether these instruments create enforceable obligations or rely on voluntary compliance. Second, it analyses the structural vulnerabilities in port State control that generate corruption risks, including discretionary detention powers, limited oversight, and regional capacity constraints. Third, it evaluates the empirical evidence on the relationship between perceived corruption and maritime safety outcomes, drawing particularly on the findings of Knapp, Franses and Whitby (2021). Fourth, it proposes and defends specific reforms, addressing the mandatory status of the Code of Good Practice, independent audit of inspection data, integrity assurance mechanisms in regional Memoranda of Understanding (MoUs), and the legal status of industry collective action networks.

2. The Legal Architecture of Anti-Corruption Instruments in Port State Control

2.1 The IMO Code of Good Practice: Soft Law Integrity Standards

The IMO Code of Good Practice for Port State Control Officers (MSC-MEPC.4/Circ.2) was approved by the Maritime Safety Committee and the Marine Environment Protection Committee in 2007. It articulates three foundational principles: integrity, professionalism, and transparency. The Code instructs PSCOs to refuse bribery, avoid misuse of authority, maintain impartiality, and report blatant cases of corruption to the maritime administration. These are sound normative commitments. However, the Code operates as non-binding guidance annexed to an IMO circular. It is not a treaty, not a regulation, and not incorporated into the mandatory IMO instruments that form the backbone of port State control enforcement.

A PSCO who accepts an inducement to overlook a detention-worthy deficiency breaches the Code. Yet the Code itself provides no international legal sanction. Enforcement depends entirely on domestic criminal law, national administrative disciplinary procedures, or the internal policies of the regional MoU under which the inspection occurs. The Code therefore creates what scholars of international law recognise as soft law: normatively significant but legally non-binding. Its value lies in standard-setting and legitimisation, not in coercion. The question that follows is whether soft law integrity standards can effectively constrain behaviour in an environment where the incentives to solicit or accept bribes may outweigh the reputational costs of violating a circular.

2.2 UNCAC Articles 5, 7, and 12: Binding Preventive Obligations

The United Nations Convention against Corruption (UNCAC), which entered into force in 2005, presents a markedly different legal character. With 192 States Parties, UNCAC is the only globally binding anti-corruption instrument. Articles 5, 7, and 12 impose specific preventive obligations that are directly relevant to port State control and maritime administration.

Article 5 requires States Parties to develop and implement or maintain effective, coordinated anti-corruption policies that promote the participation of society and reflect the principles of the rule of law, proper management of public affairs, and public property. Article 7(1) obliges States to adopt, maintain, and strengthen systems for the recruitment, hiring, retention, promotion, and retirement of civil servants that are based on principles of efficiency, transparency, and objective criteria such as merit, equity, and aptitude. This provision speaks directly to the integrity of PSCOs, who are typically public officials or authorised agents of the maritime administration. Article 12 calls upon States to prevent corruption in the private sector, enhance accounting and auditing standards, and ensure effective internal audit controls. While Article 12 is primarily directed at commercial entities, its relevance to maritime administration is clear: port authorities, classification societies, and recognised organisations all operate at the intersection of public authority and private interest.

Unlike the IMO Code of Good Practice, UNCAC creates binding treaty obligations. States Parties undertake to establish criminal offences for bribery of domestic and foreign public officials, to adopt preventive measures, and to cooperate internationally. The challenge lies not in the legal force of UNCAC but in its implementation. UNCAC does not specify how a State should structure its port State control system to prevent corruption. It leaves the design of preventive mechanisms to national discretion, subject to periodic review under the Implementation Review Mechanism. The result is a binding framework with significant latitude in operational detail.

2.3 The III Code and the Member State Audit Scheme

The IMO Instruments Implementation Code (III Code), adopted through Resolution A.1070(28) in 2013, provides a global standard for the implementation and enforcement of IMO instruments by Member States. It covers flag State, coastal State, and port State obligations. The III Code is itself non-binding in the sense that it is a Code rather than a treaty, but it is linked to the IMO Member State Audit Scheme (IMSAS), which became mandatory in 2015. Under IMSAS, Member States are audited against the standards contained in the III Code, including their capacity to discharge port State control functions effectively and consistently.

The III Code requires Member States to establish procedures for port State control, to ensure that PSCOs are qualified and provided with appropriate training, and to maintain records of inspections and detentions. The mandatory audit scheme introduces a degree of external scrutiny that did not previously exist. However, IMSAS focuses on systemic implementation rather than individual integrity. An audit may reveal that a State has adopted the Code of Good Practice or has trained its PSCOs, but it does not routinely examine whether individual detention decisions are free from corrupt influence. The audit looks at structure, not at the integrity of discrete enforcement choices.

2.4 Why the Binding/Non-Binding Distinction Matters

The distinction between binding treaty obligations and non-binding IMO guidance is not merely doctrinal. It determines where accountability can be located in international law. When UNCAC Article 5 requires a State Party to maintain effective anti-corruption policies, that State can be held to account through the Convention’s review mechanisms and through peer pressure in international forums. When the IMO Code of Good Practice instructs a PSCO to refuse bribery, no international tribunal or IMO committee can sanction the individual officer for non-compliance. The gap between the two creates a compliance paradox: the international community has binding anti-corruption obligations at the State level, but only voluntary integrity standards at the operational level where corruption actually occurs. This mismatch between macro-level obligation and micro-level guidance is the central legal weakness that reform must address.

3. Structural Vulnerabilities in Port State Control

3.1 Discretionary Detention Powers and Limited Oversight

Port State control depends on professional judgment. A PSCO must determine whether a deficiency is sufficiently serious to warrant detention, whether it can be rectified within a reasonable time, and whether the vessel can proceed to sea without presenting an unreasonable threat to safety or the marine environment. That judgment is not fully algorithmic. Even where deficiency codes and detention criteria are standardised, the final decision to detain or release rests with the individual officer.

Discretion is necessary because maritime safety is context-dependent. A particular deficiency may be critical on one vessel and manageable on another, depending on voyage length, weather conditions, and crew competence. However, discretion also creates space for arbitrary, discriminatory, or corrupt decision-making. A PSCO who wishes to solicit a bribe can threaten detention for a marginal deficiency. A ship operator who wishes to avoid delay can offer an inducement to secure release. The empirical research of Knapp, Franses and Whitby (2021) demonstrates that vessels calling at ports in States with higher perceived corruption are less likely to be detained, holding other factors constant. That finding suggests that detention probability is not determined solely by vessel condition. Discretion is doing work that the legal framework does not fully acknowledge or control.

Oversight of individual detention decisions remains limited. Regional MoUs collect inspection data, publish detention rates, and produce annual statistics. They rarely subject the reasoning behind individual decisions to independent review. A decision to downgrade a deficiency or release a vessel without detention may be recorded in a database, but the evidentiary basis for that decision is seldom scrutinised by anyone outside the administering administration.

3.2 Data Opacity and the Absence of Independent Audit

Inspection data opacity functions as a structural enabler of corruption. Detention decisions are recorded in regional databases such as THETIS for the Paris MoU or the APIS system for the Tokyo MoU. However, the reasoning behind a decision to downgrade a deficiency, to classify it as non-detainable, or to release a vessel without detention is rarely accessible for external scrutiny. The recorded outcome is visible; the decision-making pathway is not.

This opacity matters because corruption in port State control is often subtle. It may not involve a direct cash payment in the inspection cabin. It may take the form of a phone call from a senior official, a quiet understanding with a local ship agent, or a pattern of lenient treatment for vessels operated by companies with political connections. Without independent audit of inspection files, these patterns remain invisible to regional secretariats, to the IMO, and to the shipping industry. Data opacity thus protects corrupt practice from detection and distorts the empirical record on which regulatory policy depends.

3.3 Regional Capacity Constraints and Facility Scarcity

Corruption risk is not distributed evenly across the global port State control system. Regional MoUs in Europe and the Asia-Pacific generally operate with greater administrative capacity, more consistent training, and better-resourced secretariats than MoUs in West Africa, the Indian Ocean, or the Caribbean. The Abuja MoU, which covers West and Central Africa, has historically struggled with irregular reporting, limited inspection capacity, and political interference in port operations. Nwokedi, Eko-Rapheals, Obasi and Okechkwu (2022) document the performance challenges of the Abuja MoU in enforcing IMO regulations, noting that only five member States were submitting regular inspection reports before 2010.

Where port facilities are scarce and competition for cargo volume is intense, local authorities may face strong incentives to minimise detention rates in order to maintain port attractiveness. A detention delays a vessel, disrupts schedules, and imposes costs on charterers and cargo interests. In regions where port revenue is economically significant, the pressure to avoid detentions can translate into informal tolerance for substandard vessels. Capacity constraints thus interact with economic incentives to produce environments where corruption is structurally probable rather than merely individually deviant.

4. Empirical Evidence on Corruption and Maritime Safety Outcomes

4.1 Perceived Corruption and Detention Probability

The most significant empirical contribution to this field is the analysis by Knapp, Franses and Whitby (2021), who examined over 1.14 million inspection observations to test whether perceived corruption affects vessel safety outcomes. Their findings are robust and troubling. Vessels registered in flag States with higher perceived corruption are more likely to experience safety incidents, confirming that corruption undermines safety culture at the flag State level. More directly relevant to this essay, vessels inspected in port States with higher perceived corruption are less likely to be detained, even when controlling for vessel age, type, and inspection history.

That result is statistically significant and substantively important. It indicates that port State control enforcement is partially captured by the local corruption environment. Where corruption is pervasive, the deterrent effect of inspection is weakened. Substandard vessels are released. The enforcement signal becomes noisy. Ship operators learn that compliance is optional in certain ports, provided the right relationships or payments are in place. The finding directly challenges the assumption that port State control operates as a neutral technical exercise. It is, in part, a political and institutional one.

4.2 Incident Risk and the Enforcement Signal

Knapp, Franses and Whitby (2021) also demonstrate that the relationship between corruption and incident risk is not confined to flag States. Port States with higher perceived corruption correlate with higher incident risk for vessels that call there, suggesting that weak enforcement allows dangerous vessels to continue operating. The port State control system is designed to interrupt this chain of risk by detecting deficiencies before they result in casualties or pollution. When corruption interrupts the interruptor, the safety system fails in a predictable direction: towards incident.

Heij and Knapp (2019) provide additional empirical context in their analysis of shipping inspections, detentions, and incidents. They identify the dimensions of risk that port State control targets and confirm that inspections do reduce incident probability when applied rigorously. The corollary is that inspections applied corruptly or leniently forfeit that protective effect. The empirical literature therefore supports a clear causal story: corruption distorts enforcement, distorted enforcement fails to detain dangerous vessels, and undetained dangerous vessels experience incidents at higher rates.

4.3 What the Evidence Implies for Current Architecture

The empirical evidence implies that current enforcement architecture is insufficient to neutralise the distorting effect of corruption. Training programmes, ethical codes, and voluntary integrity commitments have not eliminated the statistical relationship between perceived corruption and detention outcomes. If they had, Knapp et al. would have found no significant correlation. The persistence of that correlation suggests that integrity norms, however well-articulated, are inadequate without structural accountability mechanisms. The evidence points towards institutional reform rather than further exhortation.

5. Regional Variation: The Abuja MoU and West African Integrity Challenges

Regional MoUs operate as the primary institutional layer between the IMO and national maritime authorities. They coordinate inspection regimes, harmonise deficiency interpretation, and publish regional statistics. They also vary dramatically in capacity, coverage, and integrity. The Abuja MoU illustrates these variations with particular clarity.

The Abuja MoU covers twenty-two member States in West and Central Africa, a region that has documented significant integrity challenges in port operations. Regulatory capture, bribery, and political interference have been reported in multiple jurisdictions. In response, the Abuja MoU has partnered with the Maritime Anti-Corruption Network (MACN) to deliver ethics and integrity leadership training for PSCOs. That training, delivered in Lagos in 2024, represents a constructive step. Training alone, however, does not create accountability. It equips officers with normative language and ethical frameworks, but it does not change the institutional incentives that make corruption rational for underpaid officials operating in poorly resourced systems.

Nwokedi et al. (2022) note that the Abuja MoU’s inspection data showed irregular reporting before 2010, with only five member States submitting reports. Reporting has improved since then, but irregular and incomplete data still limit the secretariat’s ability to detect anomalous detention patterns. A regional MoU that cannot see its own data clearly cannot audit its own integrity. The Abuja MoU therefore exemplifies a broader problem: regional structures exist, but they lack the independent oversight mechanisms necessary to convert integrity principles into auditable practice.

6. Industry Collective Action and Its Limits

The Maritime Anti-Corruption Network (MACN) was established in 2011 as a business-driven collective action initiative. It now comprises over 100 shipping companies and maritime service providers who have committed to the MACN Anti-Corruption Principles. MACN operates an anonymous incident reporting system that has collected over 50,000 reports of corrupt demands across more than 1,200 ports and 151 countries. It engages in port-level collective action, works with governments to reform procedures, and has produced specific guidance on integrity and transparency during port State control inspections.

Hansen (2018) characterises MACN as a form of private authority that polices corruption pre-crime, in contrast to governments that police post-crime. That distinction captures something important about the network’s function. MACN attempts to prevent corruption before it occurs by changing the information environment, aggregating corporate experience, and creating reputational consequences for persistent offenders. It cannot, however, arrest, prosecute, or detain. Its effectiveness depends on voluntary participation by companies and on the willingness of port States to engage with its recommendations.

The limits of private authority are particularly evident in port State control. A shipping company that refuses to pay a corrupt demand may face detention, delay, or commercial retaliation. The company can report the incident to MACN, but MACN cannot compel the port State to investigate. The network fills a governance gap that formal law leaves open, but it does not close the gap. Reform proposals that treat industry collective action as a substitute for binding integrity obligations overstate what private authority can deliver in a sector where enforcement powers remain sovereign.

7. Reform Proposals

7.1 Mandatory Status for the Code of Good Practice

The first reform proposal concerns the legal status of the IMO Code of Good Practice. The Code should be made mandatory through incorporation into the Procedures for Port State Control, 2011 (Resolution A.1052(27)), or through a new IMO instrument specifically addressing integrity in maritime enforcement. Making the Code mandatory would transform it from soft law guidance into a binding standard against which PSCO conduct could be measured.

The objection to mandatory status is that it reduces flexibility and may be difficult to enforce uniformly across diverse legal systems. That objection has some force. However, the current voluntary regime has had fifteen years to demonstrate its effectiveness, and the empirical evidence suggests that it has not eliminated corruption-related distortion in detention outcomes. Mandatory status would not require identical disciplinary procedures in every State. It would require each State to give legal effect to the Code’s principles within its domestic system, whether through administrative law, criminal law, or maritime regulatory frameworks. The IMO could reinforce this by amending the III Code to include explicit integrity and anti-corruption obligations for PSCOs, thereby bringing those obligations within the scope of the mandatory Member State Audit Scheme.

7.2 Independent Audit of Inspection Data

The second proposal addresses data opacity. Regional MoUs should establish independent audit functions with authority to review a sample of inspection files, compare recorded deficiencies against physical evidence and applicable IMO instruments, and identify patterns of anomalous decision-making. The audit function need not be criminal investigatory in nature. It can operate as a quality assurance mechanism within the regional MoU structure, analogous to the audit functions that already exist in financial regulation and aviation safety oversight.

Independent audit would create deterrence in two ways. First, it would increase the probability of detection for improper downgrades or releases. Second, it would generate data that regional secretariats could use to target training, identify administrations with persistent integrity problems, and inform the IMO’s implementation review processes. The audit function should have specified powers, including access to inspection records, authority to interview PSCOs, and an obligation to report findings to the regional committee and, where appropriate, to the IMO. Administrations that fail to cooperate should face consequences within the MoU’s rating and inspection coordination frameworks.

7.3 Integrity Assurance Mechanisms in Regional MoUs

The third proposal focuses on regional MoUs as the operational level where reform can be most immediately effective. Each regional MoU should adopt an integrity assurance mechanism that includes standardised reporting on inspection decisions, protected channels for reporting solicitation attempts, and periodic integrity review of member administrations. The mechanism should build on the IMO Code of Good Practice but go beyond it by creating auditable procedures.

Standardised reporting would require PSCOs to document not only the deficiency found but also the reasoning for the detention or release decision. Protected reporting channels would allow Masters, ship agents, and companies to report corrupt demands without fear of retaliation. The Abuja MoU’s partnership with MACN provides a template for how such channels might be developed, though they should be institutionalised within the MoU rather than outsourced to an industry network. Integrity review would involve the regional secretariat in analysing detention data for outliers, comparing member State performance against regional benchmarks, and conducting targeted reviews where patterns suggest integrity concerns.

7.4 Formal Legal Recognition for Collective Action Networks

The fourth proposal addresses the legal status of industry collective action. MACN and similar networks should receive formal recognition within the IMO’s facilitation and implementation frameworks. The IMO’s Guidance to Implement and Adopt Procedures against Maritime Corruption (FAL.5/Circ.48, 2022) already acknowledges the role of collective action, but that recognition remains at the level of encouragement rather than institutional integration.

Formal recognition could take several forms. The IMO could establish a consultative status for recognised anti-corruption networks, allowing them to submit data and recommendations to committees. Regional MoUs could adopt memoranda of cooperation with MACN that specify how incident data will be shared, how integrity concerns will be escalated, and how joint training will be structured. Domestic legislation could provide safe harbour provisions for companies that report corruption through recognised collective action channels, reducing the legal and commercial risks of disclosure. None of these measures would transform MACN into a public enforcement body. They would, however, strengthen the bridge between private norm-generation and public accountability.

8. Conclusion

Anti-corruption compliance in port State control rests on a weak legal foundation. The IMO Code of Good Practice articulates sound principles of integrity, professionalism, and transparency, yet it creates no enforceable international obligations. UNCAC imposes binding preventive duties on States Parties, but it does not specify how port State control systems should be structured to resist corruption. The III Code and the mandatory Member State Audit Scheme introduce systemic oversight, but they do not routinely examine the integrity of individual enforcement decisions. The result is a compliance gap between international commitment and operational reality.

The empirical evidence confirms that this gap has consequences. Knapp, Franses and Whitby (2021) demonstrate that vessels inspected in port States with higher perceived corruption are less likely to be detained and more likely to experience incidents. That finding is not an indictment of individual PSCOs. It is an indictment of the institutional architecture within which they operate. Where discretion is broad, oversight is limited, and data is opaque, corruption becomes structurally probable.

Reform should therefore focus on hardening soft law, opening inspection data to independent audit, and embedding integrity assurance in regional MoUs. The Code of Good Practice should be made mandatory. Regional databases should be subject to quality assurance audit. Regional MoUs should adopt standardised reporting, protected disclosure channels, and integrity review procedures. Industry collective action networks should receive formal legal recognition without being treated as substitutes for public enforcement. These reforms are legally coherent, empirically grounded, and politically feasible within existing institutional structures. They would not eliminate corruption in port State control, but they would significantly narrow the compliance gap that currently undermines maritime safety and the rule of law at sea.

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